-RH means you wear your glove on your right hand. It should be included at the end of the model number on your order.
Because it also means that you throw with your left hand, be sure Throws With Left Hand is shown in the cart.

These pads feature a flat pad construction which allows for maximum range of motion and field vision. 3/4" build-ups create a clavicle channel for excellent shoulder protection. These pads are designed for bigger players needing maximum range of motion. All Combat shoulder pads feature a Venti Light pad technology. With Venti Light, an outer layer of perforated closed cell EVA foam is laminated to a softer open cell inner foam. Venti Light helps reduce overall pad weight while still providing the same great protection you expect.